CZ278641B6 - Tire tread pattern - Google Patents

Abstract

Thread design of care tyre of radial construction for personal and small utility cars is created by periphery bands of internal blocks (1), middle blocks (2) and external blocks (3). Blocks (1,2,3) of individual belts are mutually separated by transversal towards periphery axis (4) of tyre lying grooves (8), which are arranged either only on half parts of thread design of care tyre or across its whole width. Middle blocks (2) and extreme blocks (3) are fitted partly by always two not thoroughgoing cuttings (5, 6) lying in transversal direction to peripheral axis (4) of tyre and partly by minimum one cutting (7) lying in direction to axis of tyre rotation. Interblock transversal grooves (8) are in section (U1) lying in area of extreme blocks (3) broadening fluently in direction to side (10) of tyre to 1,1 to 1,7 multiple of their own original width (W1) in area of middle blocks (2).

Description

The present invention relates to the tread pattern of a conventional radial structure casing for passenger cars and small commercial vehicles.

BACKGROUND OF THE INVENTION

The different tread constructions of the conventional car surface currently in use cannot provide: their driving, safety and other parameters. These parameters were guaranteed only for speeds up to 180 km / h. With the current worldwide trend of increasing speeds to 210 km / h or more, these tires are no longer suitable. The lagging is most evident in the ability of good adhesion on dry but mainly wet roads and high directional stability at higher speeds. In these difficult conditions, the requirement of high safety, which is closely related to the parameters of adhesion and directional stability, is particularly important. The unfavorable properties of tires equipped with the existing types of treads mainly manifest themselves in the limited ability to drain water at high speed from the middle part of the tread of a conventional surface. This makes the tire prone to aquaplaning, which reduces the passive safety of the vehicle occupants.

SUMMARY OF THE INVENTION

The above-mentioned deficiencies are remedied to a large extent by the tread pattern of the conventional surface of the passenger car casing, the essence of which is that the central blocks and end blocks are each provided with two non-penetrating notches extending transversely to the circumferential axis of the casing and the axis of rotation of the mantle. The inter-block transverse grooves extend continuously up to 1.1 to 1.7 times their flood width in the region of the central blocks in the region lying in the region of the end blocks in the direction of the sidewall of the casing.

The tread of the conventional surface of the casing comprises circumferential strips of inner blocks, center blocks and end blocks, wherein the center and outer blocks of the strips are separated from each other transversely to the circumferential axis of the casing by guided grooves.

By this distribution favorable conditions are created to ensure uniform adhesive efficiency over the entire width of the conventional area. The individual blocks are further divided by short transverse grooves into two active zones with different stiffness of the figures, thus reducing the risk of the tire suddenly passing into the skid. All figures and their corners with an angle of less than 90 ° are chamfered, removing the inefficient mass of the tread while increasing the volume of the water-film-engaging grooves. The peripheral grooves are straight so as to place as little resistance as possible to the flowing water. The tread pattern of the present invention meets the requirements for adhesion at higher speeds on both dry and wet surfaces, while maintaining other driving characteristics and economic parameters. An increase in the adhesion of the above-mentioned common surface construction is manifested in the circumferential but mainly in the transverse direction, which is particularly advantageous for tires intended for year-round operation on paved roads

-1GB 278641 B6. The above-mentioned properties are mainly manifested in increased driving safety at higher speeds and are independent of the direction of rotation. The scope of application includes both drive and driven axles.

Overview of the figures in the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail below with reference to the accompanying drawings showing an example of a tread design of a conventional surface of a casing, wherein FIG. 1 shows a cross-section of the casing and FIG.

An example of an embodiment of the invention

The tread of the conventional surface of the casing is formed by the peripheral strips of the inner blocks 1, the center blocks 2 and the outer blocks 3, where the blocks 2, 3 of the individual strips are separated from each other transversely to the circumferential axis 4. common surface of the shell. The central blocks 2 and the outer blocks 2 are each provided with non-continuous cuts 5, 6 extending transversely to the circumferential axis 4 of the housing, the outer blocks 2 comprising a radial section 7 extending in the direction of the axis of rotation of the housing. The interlocking transverse grooves 2 extend continuously up to 1.4 times their original width W1 in the region of the central blocks 2 ^{in the} section U1 lying in the region of the end blocks 2 towards the sidewall 10, while the inner blocks 1 have their transverse width W4 less than the transverse width W5 of the central blocks 2, which is smaller than the transverse width W6 of the outer blocks 2 · The notches 5, 6 are provided in the blocks 2, 2 at locations for which the distance W2 to W3 distance from the two transverse contour edges 9 blocks 2, 2 ® equal to 1.8 to 3.

Industrial utilization

The conventional tread pattern of the present invention can be used in the rubber industry and in retreading plants.

Claims (4)

1. The tread pattern of a conventional tire surface of a radial structure for passenger and small commercial vehicles, consisting of circumferential strips of inner blocks, center blocks and end blocks, wherein the blocks of individual strips are provided transversely to the circumferential axis of the tire. or over its entire width, characterized in that the central blocks (2) and the outer blocks (3) are each provided with non-continuous cut-outs (5, 6) extending transversely to the circumferential axis (4) of the casing and at least one radial a section (7) extending in the direction of the axis of rotation of the housing, the interlocking transverse grooves (8) extending continuously up to 1.1 to 1 in the section (U1) in the region of the end blocks (3) towards the side (10); 7 times its flood width (W1) in the region of the central blocks (2). Tread pattern of a conventional sheath according to claim 1, characterized in that the first notches (5) are perpendicular to the circumferential axis (4) and the second notches (6) are inclined relative to this axis. Tread pattern of a conventional sheath according to claim 1, characterized in that the inner blocks (1) have a transverse width (W4) smaller than the transverse width (W5) of the central blocks (2) which is smaller than the transverse width (W6). end blocks (3). Tread of a conventional sheath according to Claim 1 and 2, characterized in that the slits (5, 6) are provided in the blocks (2, 3) at locations for which the ratio of the distances (W2, W3) to the two transverse edge edges (9) of the blocks (2, 3) the following applies: W2 - = 1.8 τ '3 W3